Lamp unit



April 7, 1942. c. w. ANKLAM LAMP UNIT Filed Jan.' 30, 1939 INVENTOR M A L K N A W S E R A H D Y B T4TTORNEYS Patented Apr. 7, 1942 LAlWP UNIT Charles W. Anklam, Detroit, Mich as signor to C. M. Hall Lamp Company, Detroit, Mich., a corporation of Michigan Application January 30, 1939, Serial 'No. 253,659

3 Claims. (01. zit-541.5)

In the present state of the art head lamps for motor vehicles are of various designs, such as streamlined casings which are distinct from the vehicle body and constructions arranged within axially extending flange'Cii which embraces the flanges D and E. The forward end of the flange G2 is then peened over the flange D'at G so as to tightly clamp the parts together and to the fender or other part of the body, so as to be 5 form a seal. a continuation of the lines thereof. With all of The unit just described is capable of being these various constructions the function permounted in various designs of external housings formed is essentially the same, which necessitates or incorporated in some part of the vehicle body, the use of certain elements in definite relation to as for instance the fender. Inasmuch, however, each other. Thus, there is a concave or parabolic as the light pattern should be exactly positioned reflector, a lamp bulb properly focused within vertically, horizontally and rotatively, it is necesthe reflector, and a lens for producing a predesary to provide positioning means on some portermined light pattern in the projected beam. tion of the unit. Such positioning means is pref- It is the primary object of the invention to erably placed on the ring G and as shown, lugs obtain a construction of light projecting unit H project from the flange G at predetermined adapted for incorporation in various designs of points. There is also preferably a boss H' surlamp casings. It is a further object to produce rounding each lug H for seating upon a bearing an exchangeable unit which when inoperative in the external housing J. The lens C is rotatively can be easily and quickly detached from the fixed in relation to the ring G, by means of an lamp casing and returned to the factory for reinwardly projecting lug I on the latter, engaging conditioning. Still further, it is an object to a notch in the peripheral flange D. Also, the obtain a construction of unit in which the delicate flange E of the reflector is similarly notched to parts, such as the polished reflector, are sealed in, engage the lug I to hold the same in rotatively to eflectively protect the same from injury by fixed relation to the lens. As the lamp bulb B is dust, moisture or handling. With these and other fixed to the reflector and exactly positioned in objects in view, the invention consists in the relatio thereto, the illuminating fi a t 01 construction as hereinafter set forth. filaments will be correctly positioned in relation In the drawing: to the lens. Thus, the lugs 1-1 when engaged with Figure 1 is a vertical central longitudinal secthe cooperat n S c s in e p Casing W111 tion through a lamp unit of my improved design; insure p p Positioning of the unit- Figure 2 is a rear elevation thereof; To facilitate manufacture the ring G is prefer- Figure 3 is a sectional perspective view of a ab y formed as a die casting of a metal sufiiportion of the unit, showing the manner of conciently soft for closing about the flange D. This nectmg the lens and reflector; closing operation also eifectively seals the parts Figure 4 1s a similar view from the opposite together so that the space Within the unit is Slde; protected from the entrance of either dust or Figtilggrle 5 1s a section taken on the hne 55 of moisture. When once sealed, the parts of the I unit cannot be disassembled until it is returned B r l l a sg nca p 'gge g a g r g i c cfi 4O to the factory or to some place provided with a being of g yp in which 2; fii lmnfagl 51 suitable tool for cutting the ring. It is, therement is exac u it t b g a fore, the intention that the unit should never be y pos 9 as 0 e Properly disassembled on the road, but merely exchanged oc s 1n the refiecter- C 1S a lens preferably for other units and that all work in reconditionconcavo-convex in general form and having difmg Should be performed at the factor ferent portions of its area fashioned with flutes and prisms to distribute the light in a predeterwhue I have descnbed my Improved as mined pattern The margin of the lens C is designed for a motor vehicle headlight, it is obviformed with an outwardly projecting flange or E t It may be apphcaim? to other uses F bead D with its rear face forming a seat for an or Instance as for talntght' The essentlal outwardly extending flange E on the reflector A. Tceature such cnstrllctlns is that the A sealing gasket F is placed between the flanges t contalmng the electnc bulb and the lens or D and E, and these parts are then secured to transparent cover for Said casing are connected each other by an annular member G. This is of and Sealed to each other by a surrounding substantially right angular cross section having s. which is t t d to embrace peripheral 55 portions thereof.

a flange G adjacent to the flange E, and an having a peripheral engagement with said reflector, an annular member having a notched engagement with the peripheries of said reflector and lens to hold all of said parts in predetermined relation to each other, said annular member effecting a sealing engagement between said parts, and locating means on said annular memher for positioning said unit in said lamp.

2. A light projecting unit for head lamps comprising a concave reflector, a light bulb nonrotatively secured within and having its filament in focus with said reflector, a, patterned lensv reflector and lens, a portion of said member being deformable to clamp and seal said lens and reflector to each other, and locating means on said annular member for positioning said filament in predetermined relation to said patterned lens and also positioning said unit in said lamp.

3. A permanently sealed light projecting unit for head lamps comprising a concave reflector, a light bulb non-rotatativelysecured within said reflector and provided with one or more filaments in focused relation thereto and an annusaid filament in predetermined relation to said lens, and positioning means for said unit in said head lamp.

, CHARLES W. ANKLAM. 

